Medical appliance.



R. ILGNER.

MEDICAL APPLI'ANCE. APPucATloN man AuG.21, 1913.

Patented Sept. 26, 1916.

ma r

cafr/la, Afr/00,0. Med

UNITED sTATEs PATENT oEEIcE.

RUDoLa` ILGNER, .0E ELRING, GERMANY, ASSIGNOR To lTHE FIRM oF GEORG WOLF, G. M. B. H., or BERLIN, GERMANY.

MEDICAL APILIANCE.

, The present invention relates to tubular systems for such instruments as hysterescopes and for the inspection of cavities in the body, and more particularly to systems consisting of an outer tube, which is provided with a lateral window, and an inner tube, which may be inserted in the outer tube and which is intended for the reception of the parts of an optical system arranged for viewing laterally.

An arrangement, in'which, as was usual up to the present, the lighting device (consisting generally of an electrical incandescent lamp or of a plurality of such lamps) is disposed immovably in the outer tube, is attended by the drawback, that within the angular space available for observation through the window the illumination of the objects presented to the optical system varied according to the position of the latter. In the new tubular system the illuminating device is fixed to the inner tube. Hence the luminosity of each object observed is independent of the position of the optical system. Therefore with the new arrangement a comparatively small source of light will be found suflicient, even though the window occupies a considerable part of the circumference, nay the whole circumference of the outer tube.

The two poles of the lamp or system of lampsused will in general be connected to two portions of the inner tube, which are insulated from one another. A convenient manipulationA of the instrument may be obtained by connecting one of the two connecting devices serving for coupling up the. illuminating arrangement with a source of current -with the outer tube and by so arranging the instrument that, on inserting the inner tube in the outer tube the circuit is closed by the oiter tube contacting with one of the above-m lntioned portions of the inner tube. Thus on inserting the inner tube into the outer tube the illuminating arrangement is automatically put in circuit and is automatically put out of circuit on the inner tube being prlled out.

specifmaami` ii-:Leiters Patent.

, incandescent lamp e is Inl the construetional example of the inventlon, shown in the drawing, a tube a is closed at one of its ends by a glass cap 'al and thereby provided with a iateral window which runs right around it and turns into a central window. At its other end the tube is enlarged to form a funnel a2. Two parts provided with holes, with which they embrace the outer tube, are fixed to this tube, one of them, b1, being electrically connected to the said tube, and the otherfwhich conslsts of two parts b2 and b3, being insulated from the tube and from the part 711. Each of the said two parts hears a connecting terminal L". A tube c, which is inserted in the tube a, is provided at that one of its ends, which projects into the glass cap al, with a look-out opening c", while near its other end it rests with an annular extension c1 against the funnel a?. A part c2 is fitted on the same end of the tube c, being rotatable about it and insulated from it, and bears a pin c3, which passes through a slot a. in the funnel a? and engages a hole 72 of the part b3. An fixed in the tube c in the immediate vicinity of the opening 0; one of its poles, e1, is electrically connected with the tube c, while its other pole, e2, is connected by an insulated wire e with the part c2. If the two connecting terminals b4 be connected up to the poles of a source of current, with the tubular system as shown in the drawing the lamp is in circuit. On the inner tube being pulled out of the outer one, the contact between the annular extension cL and the funnel a2 is interrupted, so that by this means the lamp is put out of circuit. The uppermost part of an optical system is indicated by a refiecting prism f and a lens f, shown in dotted lines.

I claim:

1. In a hysteroscope an outer tube, a lateral window at one end of this tube, an inner tube adapted for the reception of the parts of an optical system and to be pushed into and pulled out of the said outer tube and to be rotatable within the same, the said inner tube having a lateral opening at one end opposite the lateral window of the outer tube and an incandescent electric lighting system fixed to the inner tube.

Q. In an instrument for inspecting cavities in the body an outer tube. a lateral window at one end of this tube, an inner tube adapted l Patented Sept. 26, 1916.n Application filed August 21, 1913. Serial No. 785,872.

for the reception of the parts of an optical system and to be inserted in the said outer tube and to be rotatable Within the same, the said inne1' tube having n lateral opening at one end opposite the lateral Window of the outer tube, an incandescent electric lighting system iixed to the inner tube and means adapted to put the said lighting system into and out of circuit respectively, by the insertion and the Withdrawal of the inner tube.

RUDOLF LGNER. 1Witnesses MARTA Finnen, EVIRD LAUSEL. 

